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 o365 special subject mail download issue

I am getting specific mail in Inbox with subject 'ACTIVE DSL DUMP EPOS' on daily basis, with extension .gz. I am trying to download attachment, however I am getting error. Below is the my script, post reading some online docs.

import imaplib
import email
import os

save_path = '/home/downloads'

mail = imaplib.IMAP4_SSL('')
mail.login("", "Abc1@2015")"Inbox")

typ, msgs =, '(SUBJECT "ACTIVE DSL DUMP EPOS")')
msgs = msgs[0].split()

for emailid in msgs:
    resp, data = mail.fetch(emailid, "(RFC822)")
    email_body = data[0][1]
    m = email.message_from_string(email_body)

    if m.get_content_maintype() != 'multipart':

    for part in m.walk():
        if part.get_content_maintype() == 'multipart':
        if part.get('Content-Disposition') is None:
        filename = part.get_filename()
        if not os.path_exists(save_path):
        with open(os.path.join_path(save_path,filename), 'wb') as fp:
Traceback (most recent call last): File "", line 17, in <module> m = email.message_from_string(email_body) File "/usr/local/lib/python3.6/email/", line 38, in message_from_string return Parser(*args, **kws).parsestr(s) File "/usr/local/lib/python3.6/email/", line 68, in parsestr return self.parse(StringIO(text), headersonly=headersonly) TypeError: initial_value must be str or None, not bytes
This is a common issue in Python 3. Your email_body variable is bytes, not a string. Bytes do not have an encoding, so if you want to use them as a string you have to take action to turn the bytes into a string with a given encoding. The way you'd do that here specifically is you'd call the decode method like so
m = email.message_from_string(email_body.decode())
Note that decode takes an encoding as a parameter, but it defaults to UTF-8, which is very likely fine for your purposes.

Generally speaking, when you run into the "must be str not bytes" kinda stuff, you want to call decode. For the opposite, you'd use encode.
thanks, now I am facing new error now.

Traceback (most recent call last): File "", line 28, in <module> if not os.path_exist(save_path): AttributeError: module 'os' has no attribute 'path_exist'
tried with os.path_exists also.this path is already exits, if I am commenting that,getting below error

Traceback (most recent call last): File "", line 30, in <module> with open(os.path.join_path(save_path,filename), 'wb') as fp: AttributeError: module 'posixpath' has no attribute 'join_path'
whereas I am not getting error while checking indivisually

Python 3.6.0 (default, Jan 22 2018, 15:43:08)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-16)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> save_path = '/home/anna/scripts/ohfdata/downloads'
>>> print(os.path.exists(save_path))
Yoriz wrote May-16-2019, 07:44 AM:
If the original question is now resolved.
Please set this thread as solved and create a new thread with the new question.
You're not calling the same function in those cases. In one, you're using os.path.exists and in the other you're using os.path_exist (which isn't a function). Similarly, it's os.path.join, not os.path.join_path.

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